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exempt : 17 phrases in 12 subjects |
| Agriculture | 4 |
| Chemistry | 2 |
| Coal | 1 |
| Electronics | 1 |
| Finances | 1 |
| General | 2 |
| Health care | 1 |
| Law | 1 |
| Materials science | 1 |
| Natural sciences | 1 |
| Politics | 1 |
| Technology | 1 |
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